Composite metal plug.



0. L. PRIME.

COMPOSITE METAL PLUG.

APPLICATION Hm) mu l9. IBH.

1,266,989. Patented May 21,1918.

Iii/5:10

PATENT OFFICE.

ORTON L. PRIME, OF MILWAUKEE, WISCONSIN.

COMPOSITE METAL PLUG.

1,266,989. Specification of Letters Patent. Patented May 21, 1918Application filed July 19, 1917. Serial No. 181,649.

To all whom it may concern: 1

Be it known that 1, Onion L. PRIME, a citizen of the United States, andresident of Milwaukee, in the county of Milwaukee and State ofWisconsin, have invented certain new and useful Improvements inComposite Metal Plugs, and I do hereby declare that the following is afull, clear, and exact description thereof.

This invention relates broadly to means for uniting two or more metalsof different kinds; specifically it consists in securing a bushing orcollar of non-corrosive material to a casting of different metal.

The principal object of the invention is to provide means for securingone kind of metal to another so that the first becomes practically anintegral part of the other.

With this general ob]ect in view, the invention resides in the novelarrangement of parts shown in the accom an 'ing drawing and describedmore speci cal y in the following specification and claim.

In the drawings:

Figure 1 represents a vrtical longitudinal sectional view through ascrew plug embodying my features of construction.

Fig. 2 is a bottom plan view of the parts shown in Fig. 1.

The device shown in the accom anying illustrations shows merely one farmin which my invention might be utilized, it being obvious that it may beemployed in various other constructions. The device in the drawing is anordinary screwplu used for closing the ends of pipes or the 11 e, or forany other purpose where a screw plug or cap is commonly utilized.

The body portion .of the plug is desi nated by the numeral 1, the samebeing su stantially cylindrical for the greater portion of its length,one end being reduced to form a polygonal or non-circular head 2 bywhich a wrench may be applied to the plug to readily rotate the same.This head is cored out as shown at 3 so as to reduce the amount of metalnecessary in constructing the plug.

he end of the plug 0 posite the head 2 is cylindrically reduce as shownat 4 whereby forming a shoulder 5. It is upon this reduced portion thatan annular bushing 6 of non-corrosive metal is placed and held inposition against both rotary and longitudinal movement.

In order to hold the portion 6 on the body of the plug an annular groove7 is formed in said reduced portion 4 adjacent the shoulder 5, the outerwall 8 of said oove being vertical, while the other wal 9 is inclmedinwardly and toward the head 2. From Fig. 1 it will be noted that thewall of the shoulder 5 merges into the inclined wall 9 of the groove 7.A number of other grooves or channels 10 are also formed in thls reducedportion 4, these last mentioned grooves extending substantially at rightangles to the annular groove 7, or longitudina y of the plug. These lon"tudinal gooves extend from the ends of t 0 body member and intersectthe annular groove 7 through the wall 8 thereof. As shown in Fig. 2 ourof thev ves 10 are provided, they being preferab y spaced approximatelyninety degrees apart. The end of the plug opposite the head 2 is alsocored out as shown at 11 for the same purpose that the recess is made inthe head 2.

The bushing 6 when placed upon the reduced portion of the plu has itsouter face substantially flush with t portion of the plug,'and thesefaces in the present instance are screw threaded as shown at 12. Theinner surface of the bushing at one end carries an annular rib 13 fordisposition in the annular groove 7, one wall of the rib being inclinedand engaged with the inclined wall 9, while the other is vertical andabuts the vertical wall 8 of the groove. The inner end of the bushingalso engages the shoulder 5 so that there will be no space between thetwo parts of the plug.

In addition to the annular rib 13, the bushing also carries on thisinner face a number of longitudinal ribs 14 which are of a length equalto the length of the grooves 10 and are disposed therein. The outer endsof the ribs 14 coincide with the lower end of the bushing and plu whilethe inner ends are formed integral y with the vertical wall of the rib13. From this description it will be seen that the rib 13 disposed inthe groove 7 will revent longitudinal movementof the bus ing member andthe other ribs 14 will hold the parts against rotary movement withrespect to each other.

Any desired means may be employed for casting the bushing member uponthe reduced portion of the body member, and any convenient form ofmachine ma be used for holding the body member whil e this is -bee faceof the body ing done. This same construction may well be employed onmany other objects than that shown, for instance, wherever it isnecessary to provide a non-rusting or noncorrosive surface or a bearingsurface. Fnrthermore the same arrangement may be carried out in theconnection with fiat objects as well as those which are cylindrical.

What is claimed A composite metal plug comprising a cylindrical shellhavin a head portion of greater diameter than its body portion andn'ovided with a continuous annular groove lietween the head and bodyportion, the

15 circumferential base of each groove being of less diameter than theshell hody,'the groove thus forming a pocket, longitudinal groovesformed in the surface of the aforesaid body portion of the shell andextending throughout its length and terminating at the circumferentialgroove, and a metallic easing jacket fitted to the shell body, annularand longitudinal grooves to form a casing of approximately the samediameter as that of the shell head.

In testimony that I claim the foregoing I have hereunto set my hand atMilwaukee, in the county of Milwaukee and Stateof Wisconsin.

0. L. PRIME.

